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Carrier 58SB0B / 58SB1B filter sizes: 14 x 25 x 3/4, 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Carrier source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below.
Auto-extracted · review pending Filter sizes auto-extracted from the manufacturer document.
Last checked against the manufacturer document:
| Sizes found in the source table |
|---|
| 14 x 25 x 3/4 |
| 16 x 25 x 3/4 |
| 20 x 25 x 3/4 |
| 24 x 25 x 3/4 |
Extracted by script from the linked document. Read the excerpt to see which size applies to which cabinet or return.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Pull the old filter and read the size printed on its frame. Nominal sizes are rounded up: a 15.5 x 24.5 in. filter is sold as 16 x 25.
Your furnace manual lists the filter's dimensions, not its MERV rating. Higher-MERV filters restrict more air. Manufacturers such as Carrier recommend keeping the clean-filter pressure drop under 0.2 in. w.c. (ideally under 0.1). Lennox warns that an over-restrictive filter can trip the high limit in winter and freeze the coil in summer. If you want MERV 11–13, a 4-in. media cabinet is the usual route. Ask an HVAC tech to check static pressure. Nominal sizes are rounded: a filter labeled 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75.
Manufacturer document for Carrier 58SB0B / 58SB1B
Last checked 2026-10-29. Manufacturers revise documents. If your unit's label disagrees, trust the label.
7. Replace filter cabinet door. or flux brush. Do not remove or disturb balance weights (clips) on
8. Turn on electrical supply to furnace. blower wheel blades.
Table 18 – Filter Size Information (In. / mm) 8. Vacuum any loose dust from blower housing, wheel and motor.
FURNACE FILTER SIZE (In. / mm) 9. If a greasy residue is present on blower wheel, remove wheel from
CASING FILTER the blower housing and wash it with an appropriate degreaser.
WIDTH Side Return Bottom Return TYPE* NOTE: Before disassembly, mark blower motor, and blower housing so
In. (mm) motor and each arm is positioned at the same location during
14-1/2 16 x 25 x 3/4 14 x 25 x 3/4 reassembly.
Washable
(368) (406 x 635 x 19) (356 x 635 x 19)
To remove wheel:
17-1/2 16 X 25 X 3/4 16 X 25 X 3/4 a. Disconnect power choke wires (if used) and ground wire
Washable
(445) (406 x 635 x 19) (406 x 635 x 19)
attached to blower housing.
21 16 x 25 x 3/4 20 X 25 X 3/4 b. Remove screws securing cutoff plate and remove cutoff plate
Washable
(533) (406 x 635 x 19) (508 x 635 x 19)
from housing.
24 16 x 25 x 3/4 24 X 25 X 3/4 c. Loosen set screw holding blower wheel on motor shaft (160+/-20
Washable
(610) (406 x 635 x 19) (610 x 635 x 19)
Carrier 58SB0B / 58SB1B filter sizes: 14 x 25 x 3/4, 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4, as listed in the Carrier source document's filter table. Which size fits depends on your cabinet and return. This page is pending human review, so check the source excerpt below. 14 x 25 x 3/4; 16 x 25 x 3/4; 20 x 25 x 3/4; 24 x 25 x 3/4.
General guidance (not from this manual): check monthly and replace 1-in. filters every 1–3 months, or follow the filter maker's guidance and your owner's manual.
Filter sizes are nominal (rounded). A filter sold as 16 x 25 x 1 actually measures about 15.5 x 24.5 x 0.75 in. Buy by the nominal size printed on the frame.
Every size found in the source table is 3/4 in. thick: 14 x 25 x 3/4, 16 x 25 x 3/4, 20 x 25 x 3/4 and 24 x 25 x 3/4. Pending human review; check the excerpt.
Manufacturer document for Carrier 58SB0B / 58SB1B (https://www.shareddocs.com/hvac/docs/1009/Public/01/58SB0B-01SI.pdf), last checked 2026-10-29.